Diarrhea may have physiological causes such as unclean diet and pathological causes such as irritable bowel syndrome. 1. Physiological causes: diarrhea often occurs when people do not pay attention to hygiene in their diet, eat unclean things or food contaminated by E. coli bacteria. In addition, if you are greedy for cold and ice-cream and other cold drinks, diarrhea is also easy to occur. 2. Pathological causes: people with irritable bowel syndrome, eating spicy and stimulating greasy food, often frequent diarrhea. People with Crohn’s disease, ulcerative colitis and other intestinal diseases, due to intestinal infections, will also often have diarrhea. There may be other reasons for love diarrhea, please go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.